LTC3100 Datasheet PDF - Linear Technology
| Part Number | LTC3100 | |
| Description | 1.5MHz Synchronous Dual Channel DC/DC Converter and 100mA LDO | |
| Manufacturers | Linear Technology | |
| Logo |  |
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There is a preview and LTC3100 download ( pdf file ) link at the bottom of this page. Total 24 Pages | ||
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FEATURES
n Extremely Compact Triple-Rail Solution
n Burst Mode® Operation, IQ = 15μA
n 1.5MHz Fixed Frequency Operation
n Power Good Indicators
n 700mA Synchronous Step-Up DC/DC
0.65V to 5V VIN Range
1.5V to 5.25V VOUT Range
94% Peak Efficiency
VIN > VOUT Operation
Output Disconnect
n 250mA Synchronous Step-Down DC/DC
1.8V to 5.5V VIN Range
0.6V to 5.5V VOUT Range
n LDO (VIN Internally Tied to VBST)
0.6V to 5.25V VOUT Range
200mV Dropout Voltage at 100mA
n Available in a 16-Lead 3mm × 3mm QFN Package
APPLICATIONS
n Bar Code Readers
n Medical Instruments
wwwn.DaLtaoSwhePeto4Uw.ecormPortable Electronic Devices
LTC3100
1.5MHz Synchronous Dual
Channel DC/DC Converter
and 100mA LDO
DESCRIPTION
The LTC®3100 combines a high efficiency 700mA syn-
chronous step-up converter, a 250mA synchronous
step-down converter and a 100mA LDO regulator. The
LTC3100 features a wide input voltage range of 0.65V to
5V. The step-down converter can be powered by the output
of the step-up converter or from a separate power source
between 1.8V and 5.5V. The LDO can also be used as a
sequencing switch on the output of the boost.
A switching frequency of 1.5MHz minimizes solution foot-
print by allowing the use of tiny, low profile inductors and
ceramic capacitors. The switching regulators use current
mode control and are internally compensated, reducing
external parts count. Each converter automatically transi-
tions to Burst Mode operation to maintain high efficiency
over the full load range. Burst Mode operation can be
disabled for low noise applications. The integrated LDO
provides a third low noise, low dropout supply.
Anti-ringing circuitry reduces EMI by damping the boost
inductor in discontinuous mode. Additional features
include shutdown current of under 1μA and overtem-
perature shutdown. The LTC3100 is housed in a 16-lead
3mm × 3mm 0.75mm QFN package.
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Two-Cell, Triple Output Converter
3.3μH
VBATT
1.6V TO 3.2V
2.2μF
SWBST VINBK VBST
VINBST
FBBST
LTC3100
PGBST
VLDO
FF EN_BURST
BOOST OFF ON
LDO OFF ON
BUCK OFF ON
MODE
RUNBST
FBLDO
SWBK
4.7μH
RUNLDO
FBBK
RUNBK GND
PGBK
3100 TA01a
1.87M
1.07M
102k
25.5k
2M
1M
10μF
s2
2.2μF
10μF
3.3V AT 100mA
VBOOST
1M
BOOST_GOOD
3V AT 50mA
VLDO
1.8V AT 200mA
VBUCK
1M
BUCK_GOOD
Efficiency and Power Loss
vs Load Current, VIN = 2.4V
100
90
80
70
60
50
40
30
20
10
0
0.01
1000
100
10
1
BOOST
BUCK
0.1
0.1 1
PL, BOOST
PL, BUCK
0.01
10 100 1000
LOAD CURRENT (mA)
3100 TA01b
3100fa
1
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ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3100E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Specification is guaranteed by design and not 100% tested in
production.
LTC3100
Note 4: Current measurements are made when the output is not switching.
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may result in device degradation or failure.
Note 6: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
68°C/W.
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise specified.
Step-Up DC/DC Converter
Efficiency vs Load Current
and VIN for VO = 1.8V
100
1000
90
80 100
70
60 10
50
40 1
30
20
10
www.DataSheet4U.com
0
0.01
VIN = 1.2V
VIN = 1.5V
0.1
PL, VIN = 1.2V
PL, VIN = 1.5V
0.01
0.1 1 10 100 1000
LOAD CURRENT (mA)
3100 G01
Efficiency vs Load Current
and VIN for VO = 5V
100
1000
90
80 100
70
60 10
50
40
30
20
10
0
0.01
1
VIN = 1.8V
VIN = 2.4V
VIN = 3.6V
PL, VIN = 1.8V
0.1
PL, VIN = 2.4V
PL, VIN = 3.6V 0.01
0.1 1 10 100 1000
LOAD CURRENT (mA)
3100 G03
Efficiency vs Load Current
and VIN for VO = 3.3V
100
1000
90
80 100
70
60 10
50
40
30
20
10
0
0.01
1
VIN = 1.2V
VIN = 2.4V
VIN = 3V
PL, VIN = 1.2V
0.1
PL, VIN = 2.4V
PL, VIN = 3V 0.01
0.1 1 10 100 1000
LOAD CURRENT (mA)
3100 G02
3.3V, 100mA Efficiency vs VIN
100
90
80
70
60
50
40
30
20
10
0 VBST = 3.3V AT 100mA
1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 4.2
VINBST (V)
3100 G04
3100fa
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LTC3100 electronic component. |
| Information | Total 24 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LTC3100.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| LTC3100 | The function is 1.5MHz Synchronous Dual Channel DC/DC Converter and 100mA LDO. Linear Technology | |
| LTC3101 | The function is Multi-Output DC/DC Converter and PowerPath Controller. Linear Technology | |
| LTC3103 | The function is 300mA Synchronous Step-Down DC/DC Converter. Linear Technology | |
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